Canon RF 24-240mm f/4-6.3 IS USMThe RF24 240mm f 4 6. 3 IS USM has a 10x optical zoom in the compact body while providing excellent Image Stablisation of up to 5 shutter speed stop. Edge to edge clarity throughout its focal length, made possible through RF mount technology. Driven by the tiny Nano USM, RF24 240mm f 4 6. 3 IS USM achieves superb speed on focusing while maintaining smooth transition.